Referring to the power of serving , especially serve afterburner , people often think of the consequences of afterburner : the ball flies out of sector and bounces too high . But actually, serve afterburner short ball, the ball is short, turning , low and good placement ; serve afterburner long ball , the ball is long, fast , turning and falls on the left and right corners. So it reflects the artistry and technical of table tennis. It not only can be done in the practice , but also is right in theory . As long as we control the ratio of impact force and friction properly when afterburner , appropriately increasing the spiral length when the ball rubs the paddle , reducing the friction thickness and increasing the time when the ball rubs the paddle , in this way , it can achieve the effect as above .